Sounds like me, except for nervous chattering. I've been excessively anxious for as long as I can remember and it has lead to all those things. Don't know what my life would be like without it, I'd be a completely different person. And medication, for the most part, just keeps it in check somewhat.

The "high-functioning" bit has me skeptical though. It's like the term "high-functioning alcoholic". It just means it's not ruining your life at the moment.

I have anxiety and identify with a lot of those things in the article, but not all. I don't know about the high functioning part. I work and do stuff. It's not like anxiety stops me from leaving the house or anything, so I guess I function. I have no idea how successful I come across to other people, or how apparent the anxiety is from the outside.